I am currently engaged in a BI (BSC) project. I have reviewed a couple of BI (BSC) tools and have come across several products (i.e. Brio) that actually advise constructing a data cloud, a virtual layer between the OLTP and the query product. This means no OLAP. I am a bit confused. Could anyone please highlight the pros and cons of using products where you have to create such data clouds, compared to constructing OLAP cubes?

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